.NET/ASP.NET/C#/VB.NET PDF Document SDK

Following are brief descriptions of the package subprograms we will use in the examples: UTL_FILE.FOPEN: This function opens the file and returns a file handle that is used in subsequent operations on the file. The syntax is UTL_FILE.FOPEN (location IN VARCHAR2, filename IN VARCHAR2, open_mode IN VARCHAR2,max_linesize IN BINARY_INTEGER) RETURN file_type;

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Figure 2-15. The Application Configuration dialog box from the MMC IIS snap-in From here the DOM extension must be mapped to the ISAPI extension for the ASP .NET Framework. It s easiest to copy the entire path to the DLL from an existing entry, then choose Add and paste it into the new entry, as shown in Figure 2-16.

INT (Int32.of_string (Lexing.lexeme lexbuf)) } FLOAT (Float.of_string (Lexing.lexeme lexbuf)) } ID (Lexing.lexeme lexbuf) } PLUS } MINUS } TIMES } HAT } token lexbuf } token lexbuf } EOF } failwithf "unrecognized input: '%s'" (Lexing.lexeme lexbuf) }

The various parameters are as follows: location: The directory location of a file This string is a directory object name and is case-sensitive The default is uppercase Read privileges must be granted on this directory object for the UTL_FILE user to run FOPEN filename: The file name, including the extension (file type), without the directory path open_mode: Specifies how the file is opened Modes include r - read text w - write text a - append text rb - read byte mode wb - write byte mode ab - append byte mode max_linesize: The maximum number of characters for each line, including the newline character, for this file (the minimum value is 1; the maximum value is 32,767) If this parameter is unspecified, Oracle supplies a default value of 1,024 UTL_FILE.

You can generate the lexer using this: fslex simpleTokensLex.fsl The generated lexer contains a single module SimpleTokensLex (named after the input file) with one entry-point function for each rule. In this case, the type of this function will be as follows:

GET_LINE: This procedure reads text from the open file identified by the file handle and places the text in the output buffer parameter Text is read up to, but not including, the line terminator, or up to the end of the file, or up to the end of the len parameter It cannot exceed the max_linesize specified in FOPEN The syntax is UTL_FILEGET_LINE ( file IN FILE_TYPE, buffer OUT VARCHAR2, len IN PLS_INTEGER DEFAULT NULL); The parameters are as follows: file: The file handle returned by FOPEN buffer: The buffer in which the read data is populated len: The maximum number of bytes to read from the file The default is null If this parameter is null, Oracle supplies the value of max_linesize UTL_FILEPUT_LINE: This procedure writes the text string stored in the buffer parameter to the open file identified by the file handle.

Figure 2-16. Configuring a new extension for a web application Now IIS knows to hand off requests arriving at the Web Server to the ASP .NET Framework. The last step to take is on the ASP .NET tab of the web application properties dialog. From here click the Edit Configuration button, then choose the Advanced tab on the dialog that appears, and the Http Handlers entry from the Section list. Choose the Add button to map *.dom to the DomHandler type, as shown in Figure 2-17.

The file must be open in write mode PUT_LINE terminates the line with the platform-specific line terminator character or characters The syntax is UTL_FILEPUT_LINE (file IN FILE_TYPE,buffer IN VARCHAR2, autoflush IN BOOLEAN DEFAULT FALSE); The parameters are as follows: file: The active file handle returned by an FOPEN call buffer: The text buffer containing lines to be written to the file autoflush: Flushes the buffer to disk after the write.

The following indicates how you can imperatively generate a simple token stream from a string and print the results in F# Interactive: > #load "simpleTokensLex.fs";; ... > let lexbuf = Lexing.from_string "3.4 x 34 xyx";; val lexbuf : Lexing.lexbuf > SimpleTokensLex.token lexbuf;; val it : SimpleTokensLex.token = FLOAT 3.4 > SimpleTokensLex.token lexbuf;; val it : SimpleTokensLex.token = ID "x" > SimpleTokensLex.token lexbuf;; val it : SimpleTokensLex.token = INT 34 > SimpleTokensLex.token lexbuf;; val it : SimpleTokensLex.token = ID "xyx"